Open Applications>>Adobe Director 12>>Configuration>>Projector iOS Resources.
Here you will see a file called "Otto.app".
Make a backup copy of this!
Open the contents of this package by doing a Control Click and selecting "Show Package Contents" from the popup menu.
A folder will open. Here you will see
The numbers refer to the pixel dimensions for iPhone and iPad icons respectively.
Make your own icon files, sized the same way, in png format and identically named.
Copy each one and paste directly into the Otto.app folder.
I couldn't find a neater way!
Thanks for the reply.
I have tried and succeeded. It's really easy.